From:
http://www.foreignpolicy.com/articles/2010/04/19/why_have_there_been_so_many_geological_catastrophes_latelyThese days, you don't have to be a conspiracy theorist or religious fanatic to wonder whether there's something strange going on with the Earth. Major earthquakes in Haiti, Chile, and China have killed thousands, and a cloud of volcanic ash has grounded flights across Europe. This past weekend also saw deadly quakes in Afghanistan, Papua New Guinea, and the Dominican Republic. So is the Earth going through a period of especially high geological activity?
No, we're just paying more attention. 2010 is actually shaping up to be a perfectly average year for quakes. According to the U.S. Geological Survey, since 1900 the Earth has experienced an average of 16 major quakes -- magnitude 7.0 or higher -- per year. In the first four months of 2010, there have been six. So though this will likely be a worse year than 1986, when there were only six major quakes total, it's unlikely to be as bad as 1943, when there were 32. And while major earthquakes like the ones in Haiti and Chile typically cause numerous aftershocks, scientists don't think that they are directly causing each other.